drew griffin, cnn, atlanta. >> drew, thanks. the deadly shooting rampage in colorado has raised alarm bells all across the country. now a maryland man is in custody after he allegedly called himself a joker and threatened to load his guns and blow everyone up. police found a huge cache of guns and weapons in his apartment. police say they are not taking any chances. >> well, when he said that he had made reference to the joker, we took this very, very seriously and moved quickly to have him evaluated mentally. but that's the way we took it, that he was making reference to colorado. he had 25 weapons in his home, most of them automatic weapons. several automatic rifles, thousands of rounds of ammunition. i would say that very few people have that much automatic weapons, ammunition. he was very serious, in my opinion. something that we could not walk away from. >> the man is undergoing a mental health evaluation. >>> london's olympic security forces have a heavy burden on their shoulders, protecting the athletes .spectators there